(registered 2013-09-06, last updated 2013-09-06)
Name : Henrik Andersson
Email : henke&henke37.cjb.net
MIME media type name : Application
MIME subtype name : Vendor Tree - vnd.adobe.flash.movie
Required parameters : The format defines no parameters.
Optional parameters :
The format defines no parameters.
Encoding considerations : binary
Security considerations :
Flash movies frequently contain active content. Execution is done in a sandboxed
virtual machine.
Flash movies are nearly always compressed. Users should be prepared for the data
expanding.
Flash movies are known to sometimes use so called "Local Shared Objects", small
chunks of data persistently stored on the computer, which can be used for similar
tracking purposes as HTTP cookies.
Flash movies can, by permission and aid of the embedding application, reach out
of the sandbox. This is traditionally done using JavaScript.
Flash movies can carry metadata, but do not generally contain personally
identifiable data.
The flash movie format does not provide either confidentiality or integrity
protection. If such protections are desired they must be supplied
externally, e.g., through the use of SSL/TLS.
Interoperability considerations :
The SWF file format has an obsoleted audio format that depends on the
endianess of the player computer. Modern content has no known endianess
issues.
Legacy content exists that may depend on player implementation bugs,
intentionally and accidentally. File format version numbers are used to
detect legacy content.
Published specification :
The latest published specification can be found at the following URL:
http://www.adobe.com/devnet/swf.html
Applications which use this media :
The Adobe Flash player and Adobe AIR
Additional information :
1. Magic number(s) : FWS, CWS or ZWS
2. File extension(s) : *.swf
3. Macintosh file type code : .
4. Object Identifiers: .
Has been previously seen under the non-standard media type application/x-shockwave-flash.
Person to contact for further information :
1. Name : Henrik Andersson
2. Email : henke&henke37.cjb.net
Intended usage : Common
Flash movies are frequently used on the web for rich content such as games and
media playing applications. It is also used for vector art based animation.
Author/Change controller : Henrik Andersson, on behalf of Adobe Systems Incorporated.